We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Author Topic: Rtty looking signal 4280kHz at UTC: 1420 Europe  (Read 1863 times)

Offline greator

  • Jr. Member
  • **
  • Posts: 32
    • View Profile
Rtty looking signal 4280kHz at UTC: 1420 Europe
« on: June 25, 2020, 1426 UTC »
Does anyone know what this signal is? Found it at 4280kHz, sounds a bit like RTTY, but i cant decode it like one of the ordinary RTTY modes. It transmitts for 3-4s, then pauses with only a carrier wave for 3-4s and then starts over.

Offline Token

  • Global Moderator
  • DX Legend
  • *****
  • Posts: 2122
    • View Profile
Re: Rtty looking signal 4280kHz at UTC: 1420 Europe
« Reply #1 on: June 26, 2020, 0104 UTC »
This is PBB, a Dutch navy station.

850 Hz shift, 75 Bd, FSK.  And it is not encrypted, you should be able to turn it to clear text.  I don't remember off the top of my head, but try 850 Hz shift, 75 Bd, 5N1

The results might look odd to you, but should be the same line repeating every transmission cycle, something like:
02A  04B  06A  08B  12A  PBB

« Last Edit: June 26, 2020, 1247 UTC by Token »
Mojave Desert, California USA


HFUnderground T-Shirt
HFUnderground T-Shirt
by MitchellTimeDesigns